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203:, known for being one of the earliest animals to be studied for its regenerative capabilities. Marine worms will also sexually reproduce, internally and externally, with some releasing spawn into the ocean currents. This is in opposition to the much more internal and invasive method displayed by flat-worms called
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will colonize at whale falls in many different oceans, using a symbiont that can digest the bones within the carcasses (Jones et al,2007) This earned them the common name of “boneworms,” and they are speculated to be a keystone species of these types of environments due to lack of organisms in whale
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This quality is also observed in deeper oceans, where tube worms that use respiratory plumes with tentacles perform gas exchange of hydrogen sulfide and methane around hydrothermal vents. These types of circulatory systems differ from marine worms previously mentioned that can perform gas exchange
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Many of these worms have specialized tentacles used for exchanging oxygen and carbon dioxide which also may be used for reproduction. These specialized tentacles allow for gas exchange, further decreasing oxygen content in dead zones and in shallow water, which encourages plant and algae growth.
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Polynoid scale worms are estimated to have arrived in deep sea ecosystems around sixty million years ago. Through the comparison of 120 genes, researchers came to the conclusion that genes related to DNA repair, recombination, and integration were only present in the deep sea polynoidae, which
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Marine worms have a variety of circulation and respiration processes. For example, in platyhelminths this is achieved through diffusion of oxygen (as well as other nutrients) across a moist epithelial layer, whereas annelids have a closed circulatory system with blood vessels lining the body.
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where hermaphroditic organisms will flight to try and impregnate their opponent while avoiding becoming impregnated. This method is driven by the biological disadvantages (such as resource need and energy expenditure) behind carrying offspring instead of the more prolific gene passage through
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and can withstand temperatures up to 90 °C (194 °F). They share this space with fellow polychaetas known as “pompeii worms” that can resist 105 °C waters coming out of vents for short periods of time, making them one of the most heat resistant animals ever recorded (Islam and
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In recent years, marine worms (especially those found in the ocean) have been observed ingesting microplastic particles found in the oceans. This trend is concerning many scientists, as marine worms act as an important food source for many fish and wading birds. Marine worms are often
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Marine worms exhibit numerous types of reproduction, both sexually and asexually. Asexually many are able to reproduce via budding or regeneration. This regeneration is most notably studied in
Plathelminths or
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have developed a relationship with symbiotic bacteria within their gut that often perform chemosynthesis from which the worm benefits. These bacteria reside in a specialized organ called the
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Marine worms can be herbivores, carnivores, parasites, detritivores, or filter feeders, but many strange examples of feeding are seen in this diverse type of animal. The group of
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in an ecosystem, and the introduction of plastic in the oceans not only diminishes the growth rates of the marine worms, but also affects the food chain of that ecosystem.
381:"Mating behavior, spawning, parental care, and embryonic development of some marine pseudocerotid flatworms (Platyhelminthes: Rhabditophora: Polycladida) in Singapore"
573:"A new species of hermit crab, Diogenes heteropsammicola (Crustacea, Decapoda, Anomura, Diogenidae), replaces a mutualistic sipunculan in a walking coral symbiosis"
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through their entire bodies. This synapomorphy of gas exchange causes even related terrestrial annelids to be restricted to moist environments.
428:"Adaptation and evolution of deep-sea scale worms (Annelida: Polynoidae): insights from transcriptome comparison with a shallow-water species"
485:"Microanatomy of the trophosome region of Paracatenula cf. polyhymnia (Catenulida, Platyhelminthes) and its intracellular symbionts"
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Marine worms are known to inhabit many different environments, having been found in both fresh and saltwater habitats globally.
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Leisch, Nikolaus; Dirks, Ulrich; Gruber-Vodicka, Harald R.; Schmid, Markus; Sterrer, Wolfgang; Ott, Jörg A. (2011-12-01).
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worms. These whale falls remain undigested for many more years than those observed with marine worm cultivations.
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correlates with the idea that they have to adapt to deal with potential hypoxia in deep sea environments.
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Jones, William J; Johnson, Shannon B; Rouse, Greg W; Vrijenhoek, Robert C (2008-02-22).
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Zhang Y, Sun J, Chen C, Watanabe HK, Feng D, Zhang Y, et al. (April 2017).
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186:. For a list of marine animals that have been called "sea worms", see
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Egger, Bernhard; Gschwentner, Robert; Rieger, Reinhard (2006-12-05).
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Igawa, Momoko; Kato, Makoto (2017-09-20). Thuesen, Erik V. (ed.).
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The
Association for the Sciences of Limnology and Oceanography
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324:"Free-living flatworms under the knife: past and present"
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Proceedings of the Royal
Society B: Biological Sciences
554:"Worms: Phyla Platyhelmintes, Nematoda, and Annelida"
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Tong, Samantha Jia Wen; Ong, Rene S.L. (June 2020).
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656:"Marine worms (genus Osedax ) colonize cow bones"
560:. University of Hawaii at Manoa. Oct 24, 2023.
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288:Marine deep sea polychaetes under the genus
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117:Learn how and when to remove this message
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631:"Giant tubeworm • MBARI"
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